Igniter or the like.



= UNITED sTA'rEs PATENT oFEioE.

WALTERl C. v'vEsrAvvAaLfoE CICAefo, ILLINois, ASSIGNOE, BY'MESNE AssIGNMEivTs, 'ro CHICAGO PNEUMATIC-Toor. COMPANY, oF CHICAGO, ILLrNoIsA CoEroEATIoN nr NEW JERSEY. l

Application filed July To all whom it may concern:

L 'Be it known that I, WALTER C. iWEsrAWAY,`

'a citizen of t-he- United States, residing at Chicago, inthe countyof Cook and State of Illinois, have inventedcertain new and usey4 My inventionhas ,for its objects the production of a more. efcient, durable fand sat- In the'drawings fwherein like. reference isfactorydevice' of the kind described, inv whichl there is a certainty of action, 'and such a device as maybe manufactured at a comparatively small cost.

To this end my invention consists in the novel -construction, arrangement and combi-v nation of parts herein shown and described,

and more parlcularlylpointed out in the charactersindicate like or corresponding` lparts, Figure 1 is a longitudinal sectional vview'of one form of my device. Fig. 2 is an enlarged' view of a portion 'of the saine. Fi 3is an end elevation of the form shown inf ig. 1. Fig. 4"is a partial sectional view of a slightly modified form e,.device. Fig. 5 is an enlarged sectional view of a portion of the'same, and Fig. 6.is an end elevation of the modified forni shown in Fig. 4.

Referring to the drawings in Whieh'the,

I' preferred formsv of the device are shown, 1

.represents the en 'ne cylinder or wallv of the combustion cham er, provided with the igniter The igniter shown, which is the form comm-only known as a jump spark igniter,

comprises a body part 2, arranged to -be secured to theeombustion chamber wall 1,.the same being rovided with a rod 3 extending therethroug and formed with a head preferably as shown at 4. The rod 3 is suitably insulated from the body part 2 by insulating `material 5 ofmica or any suitable equivalent for the purpose. 'As shown, the-rod 3 is retained 1n position relative 'to the body part 2 by meansv of suitable insulating material 7 and 6, preferably mica, .cooperating with the4 head 4, a washer 8 and' a nut v9.v

Specification of Letters Patent. Patented 1111 4,191.2.

1e, l l

1909.'. seriall na. 597,894.

The rod-3 is also provided with a thumb screw 10 or its equivalent, the same forming convenient means for the attachment conductor tothe rod. j v

Referring particularly to Figsi 1, 2 and 3, an electrode 11` extended and formed into a tubef12is arranged in the end 4 -of the rod 3, the same being securedthereto in -any suit- `able way, A substantially'similar electrode V`14'exte'1 1ded in the form of a tube, as at:

15, is secured tothe body part 2 in any suitable way., the two electrodes 1l and 14 beingv substantially' fixed relative to each other VwithA a space therebetween. The electrodes are preferably so 'arranged'that vthe ends of indicated at 18, there being a suitable space between the two tubes;

In use thewall 1 forms a part of an electrical circuit, as does the rod 3, so that there isa discharge between the electrodes 11 and v14 at the edges 18 of the tubes 12 and 15. The charge is ignited at the ends'lS `and shoots from the space around the tubes, as well as from the outer ends of the' openings 12 and 16. This gives a veryelicient and satisfactory ignition and substantiallyprevents carbon or other residue from collecting on the faces of the electrodes. Of course the relative positions of the two 'electrodes may be adjusted to meet the requirements.

Referring 'to'Figs 4, 5 and 6, the body of the igniter is substantially similar to that -shown in Fi 1, but the electrodes ar slightlylmodi ed.

Referring to Fig. 5, thetwo'electrodes 19 and 21 are enlarged or upset at'the ends and openings 23 and 24 provided extending transversely through the same, or from the faces thereof to other parts of the exterioil of the same.

also preferably brought to an edge as shown. ,This construction' 1s probably somewhat cheaper lto manufacture than the other form, and has proved very satisfactory in use.

These electrodes 20 and 22 are l. 1

In the foregoing description a complete 'I igniter is described-,but should bei-under bina't'ion lbe varied or modfied'a's desired.

i Having thusy described my invention it isjobviousthat v-vzvtrious immaterial modifica-V scribed."

byivLett'ers 'Patent is: f 1. `Ina ldevi'te `ofthe kind described' and fin; combinatiollixa plurality of electrodes stood that the'several'parts ofthe same may .do not wish to'be'understood as limiting myv'self tothe exact form, arrangement or comof`v parts herein shown. and de-l What I claim as-1iew and desire. tol securev .spaced from. each other, each electrode comprising ,a ltubel'open at both ends andar-VA ranged with an .end of eachftube proximate 'the .end ofthe oppositetube, the proximate end of' one of sald tubes brought substanj -tially. to an edge.'

I spark; plug, eomprs'ing v a body lpart" I' v 25:. lmounted .thereon'qand 'insulated` lfrom* each '1 and a pair 'of relatlvely 'fixed electrodes other, eah 'electrode comprising a tube open 'the'.similarly, ormedfend of. the opposite tube.: y 3. 11n a deviceor1v the kind .described and' at both ends, with anuend' of each beveled onthe exteriorjand arranged proximate toy 30 inw -combi'natiom'a plurality--y of relatively j ixed electrodes spaced from each other, eachele'ctrode comprising' a. tube open at bothl tube.. i,.-

Ih testimony Whereo f, Ij have hereunto Copies ofv'ths patent may be obtained for ve centi; each, by addressingv t1ie Gommissioner" of uilatents," l Washingtonj ILC. v'

l35. A ends', with any .end of each substantially-I -broughtto an ed e and'arr'anged proximate i `to .the similarly orinedend ofthe .opposite 

